DR. CLAY A. BLOCK M.D.
NPI 1962593608
Internal Medicine - Nephrology in Lebanon, NH
About Dr. Clay A. Block M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CLAY A. BLOCK M.D. (NPI 1962593608) is an individual nephrology provider in Lebanon, New Hampshire, licensed in New Hampshire (10853) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Mary Hitchcock Memorial Hospital, and is a graduate of University Of California, San Francisco School Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 6
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Clay A. Block M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Clay Block reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Littleton, NH 03561
- Reassigned Medicare billing, New Hampshire enrollment
- 126 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 12
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mary Hitchcock Memorial Hospital
Acute Care Hospitals · Lebanon, NHCheshire Medical Center
Acute Care Hospitals · Keene, NHNew London Hospital
Critical Access Hospitals · New London, NHAlice Peck Day Memorial Hospital
Critical Access Hospitals · Lebanon, NHCentral Vermont Medical Center
Acute Care Hospitals · Barre, VTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03756 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Clay Block's NPI number?
The NPI number for Clay Block is 1962593608. It was assigned to this individual provider in the NPPES registry on September 27, 2006.
Where is Clay Block located?
Clay Block practices at 1 Medical Center Dr, Lebanon, NH 03756. The listed phone number is (603) 653-3830.
What is Clay Block's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Clay Block enrolled in Medicare?
Yes. Clay Block is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Clay Block's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Clay Block reassigns Medicare benefits to 3 organizations: Dartmouth-Hitchcock Clinic (Lebanon, NH), Mary Hitchcock Memorial Hospital (Lebanon, NH) and Weeks Medical Center (Littleton, NH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Clay Block's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Clay Block accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and Taro Health list Clay Block as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Clay Block affiliated with any hospitals?
According to CMS data, Clay Block is affiliated with Mary Hitchcock Memorial Hospital, Cheshire Medical Center, New London Hospital, Alice Peck Day Memorial Hospital and Central Vermont Medical Center.
When was this NPI record last updated?
The NPPES record for Clay Block was last updated on June 30, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Clay A. Block, M.D. · NPI 1962593608
Nephrology physician in Lebanon, New Hampshire. Individual provider, active in the CMS NPPES registry since September 27, 2006.
## Identity
- **NPI:** 1962593608 (Entity type: Individual)
- **Enumerated:** September 27, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 10853 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 MEDICAL CENTER DR, Lebanon, NH 03756-1000
- **Phone:** (603) 653-3830 · **Fax:** (603) 653-3991
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Dartmouth-Hitchcock Clinic (NPI 1548210198, Lebanon, NH); Mary Hitchcock Memorial Hospital (NPI 1023092053, Lebanon, NH); Weeks Medical Center (NPI 1578155560, Littleton, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** June 30, 2011
- **Other identifiers:** Medicare UPIN F05421; Medicaid 0RE5704 (VT); Medicare PIN 000336701 (VT); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1962593608) · Data from the CMS NPPES public registry.